Valve construction



\ Jan, 10, 1950 c 1. CEDERHOLM VALVE CONSTRUCTION Filed NOV. 8, 1945 l N V ENTO R CA m. I Nev: CEDERHOLM BY W nM ATTO R N EYS Patented Jan. 10 1950 Carl Ingve Cederliolm, South Worthington, Mass.

Application November 8, 1945, Serial No. 627,436

2 Claims. (01. 251-132) This invention relates to an improvement in valves and more particularly to valves intende l for the control of fluids under pressure.

The principal object of my invention is to pro vide means for preventing leakage of thefluid= from the valve chambers through the opening or openings in the valve body through which the valve operating means extends. i

A further object is to provide means of the above character in which the fluid pressurein the valve body increases the sealing efiiciency of the parts.

' Other and further objects residing in the details of construction and the relative arrangement of the parts will be made apparent from thefol- 5 lowing specification and claims.

In the accompanying drawings which illustrate two embodiments of the invention, Fig. 1 is a plan view of a valve embodying my invention, parts being broken away;

Fig. 2 is a sectional view substantially on line 22 of Fig. 1;

Fig. 3 is ancnd elevational view looking from the right of Fig. 1, parts being broken away;

Fig. 4 is a sectional view showing the invention applied to a different form of valve; and Fig. 5 is a sectional view substantially on line 5-5 of Fig. 4.

In the drawings, Figs. 1, 2 and 3 show a valve particularly adapted to control the flow of steam under pressure to the large pressing irons and similar devices used in the garment trade. In valves hitherto used for such purposes substantial difficulty has been experienced from the leakage of steam from the valve body or casing. The condensate from the escaped steam coming in contact with the garment materials causes spotting and substantial loss. Losses from this source have at best only been reduced by constant renewal of the valve packings, and parts, at substantial expense and loss of time. These difllculties are overcome in the valve shown in Figs. 1, 2 and 3. Referring to these figures I designates the body or casing of the valve, which is formed with a steam inlet duct or port 2 aligned with port ll formed in a plug 4 threaded into the casing. Port 2 opens to a chamber 5 in the valve body from which chamber outlet port 6 opens to the outside of the casing for connection to the steam chamber of the iron or other device controlled by the valve. The inner end of port 2 is adapted to be closed by valve plug I set in the end of cylindrical valve member 8 slidably mounted in a cylindrical portion 9 of chamber 5. Intermediate its ends member 8 is cut away as at III to receive the end of an operating arm II later described. Rearwardly of arm II member 8 is bored as at I2 to receive a plunger I3. A spring I 4, compressed between the plunger I3 and a plug I5 threaded into the casing at the end of cylindrical portion 9, normally holds member 8 in valve closing position as shown in Fig. 2.

Arm II is formed integral with a flange member I6 press fitted on a squared intermediate portion ll of an operating shaft generally indicated at I8. Shaft I8 extends transversely of a portion I8 of the valve chamber above valve member 8.

One end of shaft I8 extends outwardly of the casing through a bearing opening 26, the other end of the shaft turning in a bearing 2| formed in a cap member 22 threaded into the casing as at 23. Outwardly of the casing shaft I8 is squared as at 24 to receive an operating handle 25 held in place by a nut 26.

The flange member I6 is of substantial diameter and between member I6 and the wall of the casing through which operating shaft I8 extends I position a flat annular pressure sealing member 21 having a diameter substantially equal to the diameter of flange I6. This sealing member is formed of a heat resistin plastic or of any conventional or suitable pressure sealing composition. A spring 28 compressed between cap 22 and flange I6 applies a sealing pressure to member 21. Theinner surface of flange I6 is exposed to the steam pressure built up in chamber I9 by steam passin around valve member 8 and this pressure acting on the substantial area of flange I6 serves to further compress the sealing member 21 with the result that no steam can escape out,- wardly of the casing along the operating shaft I8. As the steam pressure increases the tightness of the seal against the escape of steam increases. This arrangement is far more efficient and reliable than the gland and stufl'ing box type of seal heretofore used and overcomes the long existing difficulties experienced in the garment trade, and meets similar exacting requirements for assurance against leakage in other valve uses.

Preferably but not necessarily the faces of member 21 are formed with annular triangular shaped ridges 29 which ride in similar shaped grooves 30 formed in the adjacent faces of the wall of the valve casing and member I6.

With the parts in the position shown in Fig. 2 member 8 is held in valve closing position by spring I4. Movement of operating handle 25 to impart counterclockwise rotation to shaft I8, as viewed in Fig. 2, causes arm I I to compress spring I4 permitting the fluid pressure in duct 2 to move ing 33 formed in a cap member 34 threaded to the The housing is divided into two chambers 36 and 31 by a wall member38 having housing at 35.

valve opening 38. Opening 39 is adapted to be lufin the casing for movement at right angles to the "shaft," the free end of said arm making a lost to said shaft and fitting in said recess with its outer face engaging said disc, the inner face of said flange being exposed to the fluid pressure in the casing to compress said sealing disc radially between the peripheral edge of said recess and the operating shaft as well as axially between the flange and the casing wall, an arm extending from said flange at right angles to said shaft, a valve actuating plunger reciprocably mounted motion engagement with said plunger, and spring closed by a valve member carried by astem 4i threaded at 42 into operating shaft 32. Valvemember 49 is formed with grooved side 1ugs 43 (Fig. which ride on ribs 44 extending from the-' walls of the housing and which prevent rotation of the valve member 40. Thus upon rotation of shaft 32 stem 3! is raised or lowered tolopenj or close the valve. Operating shaft, 32-is provided adjacent its inner end with a flange 45 of substantial diameter.

A flat annular pressure sealing member 46, similar to member 2'! previously described, is positioned between flange45 and the adjacent wall of the housing cap 34. Flange 45 is adapted to be drawn toward the housing cap nuts 4'! threaded on the outer end'of shaft 32.

.The outer end of shaft 32 is provided-with an operating hand wheel 48 held in place by a screw If desired lubricating ring 50 may be provided around shaft 32;

The inner face of flange 45 is exposed to any fluid pressure in chamber 31 so that, as in the form previously described, the greater the fluid pressure in the chamber 31 the greater the pressure applied-to sealing disc 46. Escape of fluid along operating shaft 32 is thereby prevented. vI claim: 1. Operating mechanism for a fluidpre'ssuite control valve which comprises a casing, a subing, said chamber being open at one end, the inner wall of said chamber being formed with an axial opening, a valve operating shaft extending through said opening, said opening forming a bearing for said shaft, the inner wall of- '-said chamber being recessed around said opening, a cap member threaded into and olosingthe open end of the chamber, a seat formed in the inner face of the cap member and providing a bearing for the inner end of said shaft, an annular flat sealing disc fitted in said recess, a flange fixed stantially cylindrical chamber formed in the cas- L45 actuated means engaging said arm adjacent its free-. endto normally maintain said arm in valve closing engagement with said plunger.

2; Operating mechanism for a fluid pressure .,..control valve which comprises a casing, a sub stantially cylindrical chamber extending transversely of the casing said chamber being open at one end, the inner wall of said chamber bein formed with an axial opening, a valve operating ishaft" extending through said opening, a cap member threaded into and closing the open end of the chamber, the inner face of said cap mem her being formed with a seat providing a, bearing for the inner end of said shaft, a flange fixed .to' the shaft within the casing, an annular sealing member surrounding the shaft. between said flange and said opening, a spring compressed be- :to apply pressure to the sealing member 46 by tween the cap member and the flange, an arm extending from said flange at right angles to the shaft, a valve actuating plunger extending longitudinally. of the casing at right angles to the shaft and slidably mounted in the casing, said plunger being formed with a recess in which the free end of said arm makes alost motion engage- ;ment, a second plunger slidably' mounted in said first plunger and engaging the free end of said arm within the recess, and a spring compressed between the last-named plunger and the casing to'normally maintain said arm in valve closing engagement with the first-mentionediplungerc CARL INGVE CEDERHOIM.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date M3145 Cooper May 17, 1870 (565,209 Graber Jan. 1, 1 901 1,010,837 Woodworth Dec. 5, 191 1 1,290,5s7 Lane Jan. '1, 1919 1,839,264 Replogle Jan. 5; 1932 42324 -Groomes July 13, 1943 

